Display screen of a navigation device for a vehicle with a graphical user interface



The sole FIGURE is a front view of a display screen of a navigation device for a vehicle with a graphical user interface showing our new design.

The broken lines showing a display screen illustrate portions of the article and form no part of the claimed design. 

CLAIM The ornamental design for a display screen of a navigation device for a vehicle with a graphical user interface, as shown and described. 